Hey worried and trying to see why my doctor keep telling me there goin to get me a obgyn and havent

Should i keep calling my doctor about my prenative vitimans ? Because they keep telling me they are going to call and havent recieved a call from them yet and im worried that they arent doing there job they are just tellin me something plus they said they was going to call for me a obgyn to get my ulrasound but havent yet and im tired of them telling me the same thing over and over